universe/home/system/nix.nix

{
  inputs,
  config,
  pkgs,
  ...
}: {
  nix = {
    package = pkgs.nix;
    nixPath = ["nixpkgs=${inputs.nixpkgs}"];
    settings = {
      extra-substituters = [
        "https://cache.garnix.io"
        "https://nix-community.cachix.org"
        "https://cache.nixos.org/"
        "https://hyprland.cachix.org"
      ];
      extra-trusted-public-keys = [
        "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
        "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
        "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
      ];
      builders-use-substitutes = true;
      auto-optimise-store = true;
      trusted-users = [
        config.home.username
        "root"
        "@wheel"
      ];
      warn-dirty = false;
      extra-experimental-features = ["nix-command" "flakes"];
    };
  };
}